Daptomycin was approved since 2005 in Taiwan and have been studied and published in west countries. After review the published papers, the few data were described in the Asian countries or Taiwan. The objectives of this study are to evaluate the efficacy and safety of daptomycin for the treatment of Gram-positive infections under actual conditions of use, and to understand other information concerned with daptomycin prescription. This study represents an opportunity for acquiring real world data on daptomycin usage, and may provide physicians in Taiwan with the information of characteristic of the patients receiving daptomycin and to evaluate outcomes. It also provides a means to identify safety signals that emerge with clinical usage.